summaryrefslogtreecommitdiffstats
path: root/drivers/scsi/sym53c8xx_2/sym_hipd.c
diff options
context:
space:
mode:
authorMatthew Wilcox <matthew@wil.cx>2007-10-05 15:55:09 -0400
committerJames Bottomley <jejb@mulgrave.localdomain>2007-10-23 15:12:36 -0400
commit4d85b471593d03e141f9160a58574b9204363267 (patch)
tree322457b73d4b5872ddb5c0651d8820933f0a68c4 /drivers/scsi/sym53c8xx_2/sym_hipd.c
parenta44131b35ec1a46ed75014d818cb9d5706117b49 (diff)
downloadlinux-4d85b471593d03e141f9160a58574b9204363267.tar.gz
linux-4d85b471593d03e141f9160a58574b9204363267.tar.bz2
linux-4d85b471593d03e141f9160a58574b9204363267.zip
[SCSI] sym53c8xx: Simplify DAC DMA handling
By introducing the use_dac(), set_dac() and DMA_DAC_MASK macros, we can eliminate a lot of ifdefs from the code. We now rely on the compiler to optimise away a few things that we'd formerly relied on the preprocessor to do. This makes sym_setup_bus_dma_mask() small enough to inline into its only caller. Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi/sym53c8xx_2/sym_hipd.c')
-rw-r--r--drivers/scsi/sym53c8xx_2/sym_hipd.c23
1 files changed, 8 insertions, 15 deletions
diff --git a/drivers/scsi/sym53c8xx_2/sym_hipd.c b/drivers/scsi/sym53c8xx_2/sym_hipd.c
index 39f84bbe6856..5d0d356e1e74 100644
--- a/drivers/scsi/sym53c8xx_2/sym_hipd.c
+++ b/drivers/scsi/sym53c8xx_2/sym_hipd.c
@@ -778,19 +778,12 @@ static int sym_prepare_setting(struct Scsi_Host *shost, struct sym_hcb *np, stru
* 64 bit addressing (895A/896/1010) ?
*/
if (np->features & FE_DAC) {
-#if SYM_CONF_DMA_ADDRESSING_MODE == 0
- np->rv_ccntl1 |= (DDAC);
-#elif SYM_CONF_DMA_ADDRESSING_MODE == 1
- if (!np->use_dac)
- np->rv_ccntl1 |= (DDAC);
- else
- np->rv_ccntl1 |= (XTIMOD | EXTIBMV);
-#elif SYM_CONF_DMA_ADDRESSING_MODE == 2
- if (!np->use_dac)
- np->rv_ccntl1 |= (DDAC);
- else
- np->rv_ccntl1 |= (0 | EXTIBMV);
-#endif
+ if (!use_dac(np))
+ np->rv_ccntl1 |= (DDAC);
+ else if (SYM_CONF_DMA_ADDRESSING_MODE == 1)
+ np->rv_ccntl1 |= (XTIMOD | EXTIBMV);
+ else if (SYM_CONF_DMA_ADDRESSING_MODE == 2)
+ np->rv_ccntl1 |= (0 | EXTIBMV);
}
/*
@@ -1322,7 +1315,7 @@ int sym_lookup_dmap(struct sym_hcb *np, u32 h, int s)
{
int i;
- if (!np->use_dac)
+ if (!use_dac(np))
goto weird;
/* Look up existing mappings */
@@ -1837,7 +1830,7 @@ void sym_start_up (struct sym_hcb *np, int reason)
* Set up scratch C and DRS IO registers to map the 32 bit
* DMA address range our data structures are located in.
*/
- if (np->use_dac) {
+ if (use_dac(np)) {
np->dmap_bah[0] = 0; /* ??? */
OUTL(np, nc_scrx[0], np->dmap_bah[0]);
OUTL(np, nc_drs, np->dmap_bah[0]);